[r][shiny] how to render ui from a string? -


i have ui component stored in data frame or vector character. 

chr <- "fluidrow( numericinput(inputid='a'), numericinput(inputid='b') ) "

i want render character shiny ui. tried:

server.r 

shinyserver(function(input, output, session) {     output$ui <- renderui({          eval(parse(text=chr))     })  })

ui.r 

shinyui(fluidpage(     uioutput("ui")     ) )

first of all, cool idea. code's problem not in eval parse method, in numeric input arguments. missing value , label input.

try:

server.r

chr <- "numericinput(inputid='a', value = 1, label = 1)"   shinyserver(function(input, output, session) {   output$ui <- renderui({        eval(parse(text=chr))   })  })

ui.r

shinyui(fluidpage(   uioutput("ui") ) )

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